<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    </style>
</head>

<body>
    <canvas id="c1" width="600" height="400"></canvas>

    <script>
        /** @type {HTMLCanvasElement} */
        // 画布
        let c1 = document.getElementById("c1")
        // 画笔
        let ctx = c1.getContext("2d")

        let chatPath = new Path2D()
        chatPath.moveTo(200, 300)
        chatPath.quadraticCurveTo(150, 300, 150, 200)
        chatPath.quadraticCurveTo(150, 100, 300, 100)
        chatPath.quadraticCurveTo(450, 100, 450, 200)
        chatPath.quadraticCurveTo(450, 300, 250, 300)
        chatPath.quadraticCurveTo(250, 350, 150, 350)
        chatPath.quadraticCurveTo(200, 350, 200, 300)
        // 只保留路径里的内容
        ctx.clip(chatPath)

        let img = new Image()
        img.src = "./img/people.png"
        img.onload = function () {
            ctx.drawImage(img, 0, 0, 600, 400)
            // 展示路径
            ctx.lineWidth = 10
            ctx.stroke(chatPath)
        }
    </script>
</body>

</html>